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stephend
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« on: May 28, 2009, 08:26:04 AM » |
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Is it possible to mount normal framed PV panels in such a way that they form a rainproof roof? I'm thinking of using the space underneath a ground mounted PV for outdoor storage (firewood, agricultural equipment, etc), all I need is to keep the majority of rain off.
Doable?
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Justme
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« Reply #1 on: May 28, 2009, 11:52:06 AM » |
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Dont see why not.
Silicon up the joins & the jobs a goodun. Or you could use Tyvek roof wrap to make the seal.
Justme
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Navitron solar thermal system
30 x 58mm panel 259L TS
1200watts solar 120vdc
FX80 Solar controller
Victron 12v 3000w 120a
200w (250w peak) 12v turbine as a tester
6kva genny
6 x 2v cells 1550amp/h 5C
24 x 2v cells 700amp/h 5C
Total bank 4350 amp/h @12v
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djh
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« Reply #2 on: May 28, 2009, 01:05:45 PM » |
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and/or perhaps stick a bit of wood (or even aluminium  ) over the gaps to keep out the UV and slow down rain. |
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Cheers, Dave
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Justme
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« Reply #3 on: May 28, 2009, 01:54:41 PM » |
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Or a section of gutter under each join
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Navitron solar thermal system
30 x 58mm panel 259L TS
1200watts solar 120vdc
FX80 Solar controller
Victron 12v 3000w 120a
200w (250w peak) 12v turbine as a tester
6kva genny
6 x 2v cells 1550amp/h 5C
24 x 2v cells 700amp/h 5C
Total bank 4350 amp/h @12v
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stephend
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« Reply #4 on: May 28, 2009, 05:28:58 PM » |
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Thanks all, the silicon and alimunium strips seem doable. Gutters probably only feasible on joints in one direction only, i.e. all vertical joints or all horizontal joints, wouldn't be able to do both.
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alank
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« Reply #5 on: May 28, 2009, 05:45:33 PM » |
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Need to keep the panels cool though??
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« Last Edit: May 28, 2009, 07:15:45 PM by alank »
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Brandon
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« Reply #6 on: May 28, 2009, 10:03:24 PM » |
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CAT have a smoking/ outdoor social area under a PV roof, perfectly doable
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changing the world, one roof at a time ..."We can't be B&Q astroturfers. That's one conspiracy theory too far. You should cut down on the pot." - Wookey |
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northern installer
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« Reply #7 on: May 28, 2009, 10:12:20 PM » |
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depending on the thickness of your panels,it may be possible to make up a pv roof out of aluminium glazing bars,there are many systems and channel widths available,try your local glazing manufacturer?
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"government scrappage scheme still available on Tardis trade ins (dont ask how we get around the deadline...)"
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Bill H
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« Reply #8 on: May 30, 2009, 07:24:11 AM » |
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Greetings Stephen, no problem at all from my perspective. I've got (for a couple of years)a lean-to structure at the bottom of the garden. The build is 5 Navitron 110wp panels and a couple of sheets of polyacetate. Frame is 2 by 1 softwood or thereabouts. Panels stainless steel bolted through the frame. Loweredge posts are fenceposts. Trellis for runnerbeans in between  Didn't bother to seal between the panels - lazy sod. ( Panels are just butted up - I don't really mind the odd drip). Whole Structure lands onto neighbours soffits at upper edge. Cooling fine as pv panels are in free air. I keep a cord of cut logs, lawnmower, garden shredder, flamethrower, etc under there. Power extraction by SWE cable off to inverter (after DC breaker  ) Main issue to consider is probably Wind gust loading. Great functional multi-use structure. Just cranks out the kwh as the sun shines. Just do it !  Bill |
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« Last Edit: May 30, 2009, 07:33:56 AM by Bill H »
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The only safe place for a fusion reactor is 93 million miles away.
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SteveH
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« Reply #9 on: May 30, 2009, 09:12:03 AM » |
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Would there be any advantage to overlapping the upper frames over the lower ones... this would give a natural expansion point down the roof if not across it, but then it would also give a more secure way to shed rain without it puddling against the sealing strips between butted panels?
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Preveli, South Crete.
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Bill H
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« Reply #10 on: May 30, 2009, 05:04:01 PM » |
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Hello, so, lets talk scale. How many panels, how many sq ft, etc etc.... Is it the garden shed or T5 ?  Bill |
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The only safe place for a fusion reactor is 93 million miles away.
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stephend
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« Reply #11 on: May 30, 2009, 09:55:53 PM » |
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Would there be any advantage to overlapping the upper frames over the lower ones... this would give a natural expansion point down the roof if not across it, but then it would also give a more secure way to shed rain without it puddling against the sealing strips between butted panels?
Seems sensible. Would this influence the strength of the mounting? Seems like having them at an angle to the frame could be a problem, e.g. the mounting bolts wouldn't be flush with the surface, might stress the frame. Size wise, it will be about 15 square meters. |
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scott
Newbie
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Posts: 15
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« Reply #12 on: July 02, 2009, 09:47:27 PM » |
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best option solar roof tiles
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Ivan
Guest
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« Reply #13 on: July 07, 2009, 04:02:53 PM » |
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worst option - solar roof tiles!
They are horrendously expensive, and the ones I saw a couple of years ago had the backing material curling up at the edges - looked very cheap and nasty.
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